问题
单项选择题
在单代号搭接网络计划中，STFi-j表示( )。
A．工作i-j的最迟完成时间
B．i工作和j工作的时间间隔
C．i工作和j工作开始到完成的时距
D．工作i-j的自由时差
答案
参考答案：C
解析： 1Z203032工程网络计划的编制方法
工作i开始时间与其紧后工作j开始时间的时间间距。
搜题请搜索小程序“爱下问搜题”
在单代号搭接网络计划中，STFi-j表示( )。
A．工作i-j的最迟完成时间
B．i工作和j工作的时间间隔
C．i工作和j工作开始到完成的时距
D．工作i-j的自由时差
参考答案：C
解析： 1Z203032工程网络计划的编制方法
工作i开始时间与其紧后工作j开始时间的时间间距。
| 阅读短文，回答下列问题。 |
| Mr Ma is our science teacher. His class is very interesting (有趣的). We can learn a lot from his class. We like him very much. He often helps us make things. We make a lot of different things. Some of us make model planes. Some make model boats. Others make robots. Look at that robot! We like it very much, because it can do many things for us. It is now cleaning the windows of an office building. It is not easy for workers to do this job, because that is a very tall building. It is dangerous (危险的) for people to do the work. The robot is a great help. |  |
| 1. What does Mr Ma teach? 2. Do the students like Mr Ma? 3. What do they make? 4. What does the robot do? |